Advanced Sound Analysis

We will look at the theory of signal processing, tips on making more precise measurements when analysing bat sounds, and species identification including some more unusual/challenging calls. 

Techniques will be demonstrated in Anabat Insight, BatSound, Kaleidoscope and Sonobat. This workshop is a great follow-on from our 'Introduction to Sound Analysis' workshop. Although some prior knowledge of sound analysis is helpful, information will also be included for beginners.

Run online via Zoom and led by Philip Briggs, Monitoring Manager for the National Bat Monitoring Programme. Agenda below.

Everyone is welcome

Bat Conservation Trust wants everyone to have opportunities to connect with bats and nature and get involved with conservation. We recognise that people of colour and racially or ethnically minoritised groups are particularly underrepresented in the conservation sector. If this is relevant for you, please select the concession for underrepresented groups when booking. Concessions are also available for BCT and bat group members, NBMP volunteers, students, and those who are unwaged.

Identifying bats in Flight (optional purchase)

This 28-page booklet introduces different types of bat detectors and gives an overview of field and call characteristics of UK bat species. However, it is not a requirement for the workshop and all attendees will receive a simpler PDF document showing species call shapes and call parameters. 

If you have any questions, please get in touch with us at nbmp@bats.org.uk. Please read our Privacy Policy for workshop attendees.

Workshop outline:

Starts at 6:30 pm

Theory of signal processing

    What is sound (signal) analysis?

    Sampling Theory and Sampling Rate

    Harmonics

    Aliasing and missing harmonics

Tips on improving the precision of your measurements

    Fast Fourier Transform settings and how they affect clarity of call shape and accuracy of measurements

    Threshold and contrast settings - improving accuracy of start/end frequency measurements

    Oscillogram vs spectrogram for time measurements

    Power spectrum settings for improved peak frequency measurements

    Demos in Anabat Insight, BatSound, Kaleidoscope and SonoBat

Overview of automated classifiers

Overview of species ID tips

Species identification quiz including some challenging species

Finishes at 8:30 pm